260 The Botanical Gazette. [Jaly, 
himself observed some of the lobed organisms in his cultures 
There does not seem to be any very important difference : 
between the organisms described by Laurent’ and that ob 
tained by myself. The result is the more satisfactory since 
the present writer did not know, at the time the organism 
was separated and first studied, what the real nature of Law 
rent’s organism was. The account of the organism given by — 
Ward agrees in all essential features with the one obtained by — 
Laurent and myself. Fe 
Frank’s mycoplasm of the tubercles is identical with the 
hyphe, of course, but the reconciliation of his Rhisobium, a 
a micrococcoid organism, with the forms obtained in culture by : 
Beyerinck, Laurent and’ myself is not so easily effected, — 
though the great majority of the individuals in the cultures — 
eous immersion lens also served very well to bring 0 
definition of the form. Better results were obtained nee 
amining the organism in a living condition, or by rage 
in a living condition with eosin. Killing and fixing the 6 
ganism by heat on the cover glass did not give such gout the 
sults because of. the lack of firmness in the body © 
organism. pair i 
Another question which arises, and which, if phe . 
the affirmative, may help to explain some of the se 
cies between the organisms in cultures by different symbiont 
tors, is this: are there species or races of the nie “s 
The bacteroids, by those who believe in the eal the of 
microsymbiont, are generally accepted as one form | 
ganism. They are regarded by Prazmowski 
forms, because of their departure from the a 
rod-like bacteria. Whether or not we term them rans 
lution it seems pretty certain that, when the * f bacterois 
reached the firmness exhibited by the great mass 0 wth, sine 
in the tubercles, they are no longer capable bat 
they have lost that power in becoming epee - 
storage of proteid substance. er. announce 
Prazmowski says the death of the bacteria ame It wood 
in most cases by a change to the branched i 
